You're reading it wrong, agentEgypt. The civil servant who wrote the memo that got leaked believed Nicola Sturgeon had said this but appears to have got it wrong, without any malicious intent. The French Consulate confirms that NS never said she wanted David Cameron as PM.
The BBC report linked above says:
The confidential memo was published by the Daily Telegraph on 3 April as the general election campaign got under way.
It was written by a civil servant in the Scotland Office and claimed Ms Sturgeon told the French Ambassador to the UK, Sylvie Bermann, that she would prefer Mr Cameron, the leader of the Conservatives, to remain as prime minister.
And lower down:
The memo was written following a discussion between the civil servant, who has not been named, and the French Consul-General about a meeting Ms Sturgeon had with Ms Bermann.
It stated that part of the conversation between the ambassador and the first minister might well have been "lost in translation".
At the time, Ms Sturgeon said she rejected the claim "100%", while the French consul-general in Edinburgh, Pierre-Alain Coffinier, also said the memo was not accurate and that Ms Sturgeon had not expressed any preference for a prime minister.
And lower down still:
The Cabinet Office report said the civil servant who wrote the memo believed it to have been an accurate record of the conversation that took place between him and the French Consul-General, but pointed out that he had already highlighted that it could have been "lost in translation".
The Cabinet Secretary Sir Jeremy Haywood concluded that there was no reason to doubt that the civil servant recorded accurately what he thought he had heard.
The report said: "Senior officials who have worked with him say that he is reliable and has no history of inaccurate reporting, impropriety or security lapses.
"The Cabinet Secretary has concluded that there is no reason to doubt that he recorded accurately what he thought he had heard. There is no evidence of any political motivation or 'dirty tricks'."